Improvement in stove-dampers



T. WHITE. 2 Sheets-Sheet 1. Stove-Damper.

No. 204,406. Patented May 28, I878.

.fl ttest. Inventor p W005.

N. PETERS, 9HOTO LITNOGRAPHER. WASHINGTON. D c.

2 Sheets-Sheet 2.

T. WHITE. Stove-Damper.

No. 204,406. Patented May 28, I878.

li-ZEKQIH N. PFI'ERS, PHOTILUTIIOGRAPIIER, WASHINGTON. D C.

UNITED STATES PATENT QFFICE.

THOMAS WHITE, QUINCY, ILLINOIS, ASSIGNOR OF ONE-HALF HIS RIGHT TO DANIELE. PARRIS, OF TROY, NEW YORK.

IM PROVEM ENT IN STOVE-DAM PERS.

Specification forming part of Letters Patent No. 204,406, dated May 28,1878 application filed March 16, 1878.

To all whom it may concern:

Be it known that I, THOMAS WHITE, of Quincy, in the county of Adams andState of Illinois, have invented certain new and useful Improvements inAutomatic Dampers for Stoves, of which the following is a specification:

This invention relates to an improved means for operating stove-dampersor draftregulators by swinging the doors; and its object is to preventsmoking at the doors of stoves when opened.

It consists in the combination, with a stove door and damper, of aconnecting-link composed of two parts, which are longitudinallyadjustable with respect to each other, whereby the operation of thedamper by the swinging of the door may be regulated as desired, as willbe hereinafter particularly described; and it also consists in the novelconstruction of an adjustable link or rod for connecting the door anddamper.

In theaccompanying drawings, Figure 1 represents a vertical longitudinalsection of a wood-stove, having its pipe leading from one side, and itsdamper-operating devices constructed and arranged according to myinvention; Fig. 2, a horizontal section of the same on line w 00, Fig.1, showing the stove-door closed; and Fig. 3 is a similar view, showingthe door open. Fig. 4 is a side elevation of a stove having its pipeleading from one end, and provided with my improvement. Fig. 5 is a topview, and Fig. 6 an edge view, of the adjustable damper-rod.

The letterA designates the damper, arranged at the entrance of thesmoke-flue and pivoted at its middle; and a is a stud or eye, projectinginwardly from about the center of said damper. B is a rod, connected atone end to the eye of the damper, and at the other end to a sliding bar,B, arranged in a horizontal guide-sleeve, O, projecting inwardly fromthe end plate of the stove, and surrounding a slot cut therein. Theouter end of this sliding bar projects through the stove-plate, and hasa laterally extending arm, d, in which is out a curved slot, 0, throughwhich passes a pin, f, which passes also through two lugs or cars, g g,projecting from the front of the stove-door,

one, 9, above and the other, g, below said arm, and forming a portion ofthe door-hinge. The sliding bar B has its end bent flatwise andbifurcated, as shown at h, and through the greater part of the length ofsaid arm is out a slot, 5. Upon the upper surface of this bar are formedserrations i, and upon this serrated portion is arranged a rectangularwasher or plate, j, having its ends bent to form lips j, the long edgesof which are sharpened and engage with the serrations 'i'. The outer endof the rod B is screw-threaded, and bent at an angle so as to extendupward through the slot in the bar B and through the plate or washer j,in which position it is held by a nut, lc, an intermediate portion ofsaid rod lying in the fork h.

By loosening the nut it it will be seen that the plate or washer j maybe moved toward either end of the bar B, so as to increase or diminishthe length of the rod B projecting beyond the end of said arm. Now, whenthe stove-door is shut, the plate or washer j may be so adjusted andsecured as to hold the damper either entirely closed, as shown in fulllines, Fig. 2, or partly open, as shown in dotted lines.

In opening the stove-door the pin f strikes against the outer wall ofthe slot 6 and causes the bar B to move longitudinally, thus drawing therod B, so as to open the damper and when the door is fully open, or ataposition at right angles to the end of the stove, the bar B will ceaseto slide outward, the shape of the slot 6 permitting the door to swingfarther on its hinges without affecting said bar.

In the stove shown in Fig. 4 the pipe is attached at one end, and thedamper A is hinged at its lower edge, the rod n, to which it is firmlyattached, extending out through the wall of the stove, and bent to forma crank, 0, to which the operating-rod B is attached. Said crank playsin a recess, 1), in the stove-wall, and the operating-rod projectsthrough an aperture in the front wall of this recess. The operation ofthis modification is obvious.

In the style of stove shown in Fig. 1 the damper A is kept fully closedwhen the door is shut, the draft passing from the front-under thefire-basket Q, and to the flue in the direction of the arrows; but in astove only having single walls the damper-rod must be so adjusted as topermit the damper to stand open sufliciently to allow enough draft topromote a proper combustion of fuel and to permit the escape of smoke.

Though I have shown only a wood-stove in illustrating my invention, itis obvious that it may be applied to coal-stoves as well, if founddesirable.

It is well known that when stoves are opened for adding fuel or otherpurposes, smoke is 1iable to issue from the door unless the damper hasbeen opened also to permit a draft directly inward through the door andfire-chamber to the flue; and while this is more frequently the casewith wood than with coal stoves, it often occurs with both, owing toforgetfulness or neglect to properly adjust the damper.

By my improvement the simultaneous opening of the door and damper issecured, and the annoyance of smoky rooms and the double trouble ofopening separately the door and damper prevented.

The damper and door of a stove have heretofore been connected by a rod,the outer end of which projects through the wall of the stove,

and is provided with rack-teeth gearing with a toothed segment attachedto the door. The inconvenience of this projecting end is obviated by myimprovement, in which the adjustment is effected inside of the stove.

Having now fully described my invention, I claim- 1. The combination,with a stove door and damper, of a connecting-link composed of two partslongitudinally adjustable upon and with respect to each other, so thatsaid link maybe lengthened or shortened within the stove, substantiallyas and for the purpose set forth.

2. The combination of the rod B, adjustable washer or plate j, and theserrated slotted bar B, having the lateral slotted arm d, said partsbeing held together by a suitable nut, substantially as described, andfor the purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand inthe presence of the subscribing witnesses.

THOMAS \VHITE.

Witnesses DICKERSON MCAFEE, CHAS. W. SHINN.

